What is the cross-sectional area of rectangular duct mainly depending on? What are the requirements of relevant rules for C-shaped and S-shaped slots?
The cross-sectional area of rectangular duct is determined by the main engine's air volume and breeze pressure from a professional point of view. In this kind of duct, the relevant rules of C-shaped and S-shaped inserts are required for:
(1) For C-shaped and S-shaped inserts, special mechanical equipment should be used to stop rolling, and the width of the insert should be matched with the air duct。 The elongation at both ends of C-shaped cutter should not be less than 20 mm。
(2) If C-shaped and S-shaped horizontal inserts are used, the length of the side of the air duct shall not exceed 630 mm. If the S-shaped spline is used alone, then corresponding fixing measures should be taken at the joints. In addition, the C-shaped right-angle socket can be used for the connection of branch pipe and main pipe.
(3) The connection between the outlet and the air duct outlet should be smooth and close。 In addition, the length of the degree insert should be different from the width of the duct。 After the plug-in is completed, it can be folded。
In addition, what we need to know is that if the rectangular air duct is made of aluminium sheet, then the connection can not be stopped with C-shaped and S-shaped splines.
Data and application of rectangular duct
Plastic rectangular air duct is one of the rectangular air ducts。 Generally speaking, it is a kind of air duct made of rigid polyvinyl chloride plastic sheet and processed。 However, due to the poor thermal stability of this data, the air duct has a range of applied temperature, which is - 10 C - 60 C。 In its application, mainly in the delivery of corrosive gases, because of its good chemical stability。